FIELD: electroplating.
SUBSTANCE: used for monitoring microarc oxidation (MAO). The method includes oxidizing the surface of test samples in specified modes, differing from each other in values of current density, period, recording during the MAO process the value of the acoustic emission (AE) parameter, defined as the time period from the moment of reaching the maximum at the second monotonic stage of increase recorded in the MAO process amplitudes of AE before the end of the oxidation process, measurement of the numerical values of the required characteristics of the oxide coating at the end of the MAO, calculation of the coefficients of the regression equations, which are a system of linear polynomials, the number of which is determined by the number of measured coating characteristics, establishment of a pattern between the numerical values of the coating characteristics, the values of the MAO current density and the AE parameter, defined as the time period from the moment of reaching the maximum at the second stage of increasing the AE amplitude, recorded during the MAO process, until the end of the MAO process, performing the MAO of a part based on an established pattern, while in the monitoring mode the value of the AE amplitude recorded in the MAO process is controlled, and when the maximum is reached at the second monotonic stage of increasing AE amplitude, the time period recorded by the AE parameter begins to count; at the end of the controlled period of time, based on the established pattern between the numerical values of the coating characteristics and the specified modes, the MAO process is stopped.
EFFECT: ability to control the characteristics of the oxide coating applied to metals and alloys of the valve group using the MAO method, which makes it possible to increase the accuracy of the specified values of the characteristics of the oxide coating.
1 cl, 2 dwg
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